Volks AutosChris Nott
Results 1 to 2 of 2
  1. #1

    Join Date
    Jun 2012

    New water temp sensor made my A3 slower?

    Hi guys,

    I've recently been for a remap on my A3 1.8T Engine code AGU. When it was at the company (R-Tech), they noticed it had a faulty water temperature sensor before remapping. They remapped it anyway, but obviously advised that I had it replaced.

    Yesterday I got it back from my local garage. It's had a new water temp sensor fitted, but it feels slightly 'weaker' than before. I can't tell whether it's the humid weather we've had in England the past few days, my imagination or it is actually slower (or a mixture haha)

    What I'm hoping you guys will know is whether or not the new water temp sensor is regulating differently to the faulty one that was on before, therefore affecting the car's performance? Obviously the remap was installed when the car had the faulty sensor, and now a new one has been fitted, would it have a negative affect on the remap, or perhaps mean the remap won't work as well with the new sensor as it did with the old faulty sensor?

  2. # ADS
    Join Date
  3. #2
    bengal's Avatar
    3rd Gear
    Eskiv Champion

    Join Date
    Sep 2010
    It could be that it was running rich with the bad sensor and now it has been replaced the ecu needs to relearn with the new sensor, this takes x amount of miles.

    You could try disconnecting the battery for half an hour, when reconnected the ecu will have been reset back to zero and it will relearn quicker. You will need to realign the throttle body in doing this though which you need fully registered vcds.

    If you don't have vcds then I'd just carry on driving it and it should sort itself out in no time.

    I've had issues with mine running rich in the three years I've had the car and every time it has taken about 50 miles to sort itself out.



Similar Threads

  1. fitted my new green temp sensor now its not even getteng up to degrees
    By wallace78 in forum A4/A4 cabriolet/S4 forum(B6 chassis)
    Replies: 10
    Last Post: 6th April 2012, 10:29
  2. Coolant temp sensors -OEM brand new £15/£18 (half price!)
    By jcb in forum For Sale/Wanted - Audi Parts
    Replies: 0
    Last Post: 4th April 2012, 11:03
  3. Oil dipstick guide..and water temp sensor
    By Custard in forum A3/S3 Forum (8L Chassis)
    Replies: 6
    Last Post: 8th December 2009, 18:47
  4. Coolant Temp Sensor
    By teknobod in forum A6/S6/Allroad forum (C5 Chassis)
    Replies: 1
    Last Post: 22nd January 2004, 11:14
  5. S3 Temp Sensors
    By AndyS3 in forum A3/S3 Forum (8L Chassis)
    Replies: 1
    Last Post: 7th October 2003, 16:53

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO